Machine for treating hides or leather.



A. H. KEHRHAHN.

MACHINE FOR TREATING HIDES 0R LEATHER.

' APPLICATION FILED JULY 17. 1913.

1, 147,098, Patented July 20, 1915.

WZZVZtf COLUMBIA PLANOURAPH co., wAsI-llNqTuN, D. c.

ALEXANDER HEINRICH KEI-IRHAHN,, OF FRANKFORT-ON-THE-MAIN, GERMANY.

MACHINE FOR TREATING HIDES R LEATHER.

To all whom it may concern:

and German Empire, have invented certain new and useful Improvements in Machines for Treating Hides or Leather, of which the following is a specification.

My invention relates to machines for treating hides or leather, in which the working material is supported by a revolving rubber or other flexible tube, which may be filled by compressed air.

. More particularly the invention relates to the way in which the tube is mounted and the means by which it is driven.

Various forms of the invention are shown in Figures 13.

In the accompanying drawing: Fig. 1 is a side view partly in section of the principal parts of a machine embodying my invention; Fig. 2 a similar view of a modification, and Fig. 3 a similar view of a still further modification.

Referring to Fig. l, a tool, shown as a revolving knife cylinder 2, is mounted in a frame 1. The same frame supports a driven feed roll 3 of ordinary description, which in conjunction with the movable feed roll 4: feeds the hide 5 past the knife roller 2. The feed roll 4 is mounted on a rocking bell crank lever or frame 6,'pivoted in the frame 1. This lever is brought into the working position shown by a foot treadle or any other means known to the trade. This working frame carries also the rubber tube 7, which presses the hide 5 against the tool 2. This tube is supported on its back by a driven roll 9 by which means the revolving of the tube is positively secured over its entire length. On its sides the tube is loosely supported by jaws 8, of which the lower one only is essential.

To insure a positive drive of the tube and to keep it away from the knife cylinder while there is no hide between them, I prefer to arrange the guides of the tube at an angle to the horizontal line so that the weight of the tube keeps it down on the backing roll 9. In long or light rolls I prefer to have a metallic or otherwise heavy bar 11 inside of the tube, to press it against roll 9.

If the tube is very long or strong pressure Specification of Letters Patent.

Application filed July 17, 1913.

Patented July 20, 1915.

Serial No. 779,531.

is required, I guide the tube sidewise be tween rollers 12 and '13. By doing this, I may have the tube firmly held between them and thereby increase the working pressure, by preventing the tube from bulging out. E or the working of small hides it is essential, to have the distance between rollers 4: and 7 as small as possible. I thereforemake the roll 12 of small diameter and to give it sufficient power of resistance I support it,

on its entire length against the feed roller 4:, which must be strong anyway. This arrangement contains another advantage of my construction. The upper guide roll 12 being driven by 4 pushes the tube. away from the knife roll against the backing roll 9. On the other hand, this efiect is doubled by the fact, that the other roll 13 is driven by the tube by friction.

It is evident, that the roll 13 may be replaced by a smooth jaw 8 or a smooth roll, driven at a lower circumferential speed than 12.

I claim- 1. In a machine for treating hides, in combination, a working tool, means to pull the hide past said working tool, a revoluble rub ber tube adapted to press the hide against said working tool, a backing roll for said rubber tube, and means to support and hold said rubber tube crosswise to the plane in which the workingpressure is adapted to act, substantially as set forth.

2. In a machine for treating hides, in combination, a working tool, a cooperating revoluble rubber tube adapted to act against the hide, and a revoluble backing roll for said rubber tube adapted to impart by friction rotary movement to said rubber tube along the entire line of contact between said rubber tube and said backing roll, substantially as set forth.

3. In a machine for treating hides, in combination, a Working tool, a cooperating rubber tube adapted to act against the hide to be operated on, a backing roll for said rubber tube adapted to be rotated and to impart by friction rotary movement to said rubber tube along the entire line of contact between said rubber tube and said backing roll, and means for supporting and guiding said rubber tube crosswise to the plane in which the working pressure acts, substantially as set forth.

4:. In a machine for treating hides, in com bination, a working tool, a cooperating revoluble rubber tube adapted to act against the hide, a revoluble backing roll for said rubber tube adapted to impart by friction rotary movement to said rubber tube along the entire line of contact between said rubber tube and said backing roll, and rotatable rolls in contact with said rubber tube on against the hide, a revoluble backing roll for said rubber tube adapted to impart by friction rotary movement to said rubber tube along the entire line of contact between said rubber tube and said backing roll, a rotatable roll to support said rubber tube, and a rotatable roll arranged between is adapted to transmit movement of rotation from said feed roll 'to rubber tube, sub

stantially as set forth. I

6. In a' machine for treating hides in combination, a working tool, a cooperating revoluble rubber tube to support the hide, a revoluble backing roll for said rubber tube, and means for holding said rubber.

tube in working position above said back ing roll, substantially as set forth.

7 In a machine for treating hides in combination, a Working tool, a cooperating revoluble rubber tube 'to support the hide, a revoluble backing roll for said rubber tube, 1 means for holding said rubber tube in working position above the backing roll, and a barwithin said rubber; tube adapted to increase the weight of'said rubber tube, substantially as set forth.

In witness whereof I have 'signedmy name in the presence of two subscribing witnesses.

ALEXANDER HEINRICH 'KEHRHAHN.

VVitnessesi HENRY HAsrER, lVoLDnMAR HAUPT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

